Fix: unitialized variables in tests

Some fields in the structures were not set before being sent. It was OK
in this context because it was useless parameters, but Coverity
complained.

Fixes Coverity 1127092 and 1127091

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: Warn that kernel loglevels are unsupported

Warn the user when the log level option is used when the kernel domain
is selected. Also, don't show the log level in the confirmation message
when kernel events are selected.

Fixes Bug #645

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>